Abstract
We discuss various symmetry properties of the reparametrization invariant toy model of a free nonrelativistic particle and show that its commutativity and noncommutativity (NC) properties are the artifact of the underlying symmetry transformations. For the case of the symmetry transformations corresponding to the noncommutative geometry, the mass parameter of the toy model turns out to be noncommutative in nature. By exploiting the BRST symmetry transformations, we demonstrate the existence of this NC and show its cohomological equivalence with its commutative counterpart. A connection between the usual gauge symmetry transformations corresponding to the commutative geometry and the quantum groups, defined on the phase space, is also established for the present model at the level of Poisson bracket structure. We show that, for the noncommutative geometry, such a kind of quantum group connection does not exist.
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